228519425 has 12 divisors (see below), whose sum is σ = 285436716. Its totient is φ = 181478400.

The previous prime is 228519407. The next prime is 228519427. The reversal of 228519425 is 524915822.

It can be written as a sum of positive squares in 6 ways, for example, as 3489424 + 225030001 = 1868^2 + 15001^2 .

It is not a de Polignac number, because 228519425 - 2¹⁶ = 228453889 is a prime.

It is a super-2 number, since 2×228519425² = 104442255204661250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228519427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29936 + ... + 36785.

It is an arithmetic number, because the mean of its divisors is an integer number (23786393).

Almost surely, 2^228519425 is an apocalyptic number.

228519425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228519425 is a deficient number, since it is larger than the sum of its proper divisors (56917291).

228519425 is a wasteful number, since it uses less digits than its factorization.

228519425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66868 (or 66863 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 228519425 is about 15116.8589660683. The cubic root of 228519425 is about 611.3750446401.

The spelling of 228519425 in words is "two hundred twenty-eight million, five hundred nineteen thousand, four hundred twenty-five".